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View Full Version : 2009 lmm tuning issue



05maxlly
July 25th, 2017, 01:41 AM
I am trying to read the program that is on it. I connect to it and it takes 45 min to compete read which I know should only take 6 min. Then it errors out to this 21321


HELP I think I need a PCM but would like assistance

GMC-2002-Dmax
July 26th, 2017, 04:50 AM
The ecm is locked with a patch, if its a DSP5 you will never get the file out because the file is stored on the flash chip and in other READ ONLY MEMORY areas.

If it is a single tune and the patch is applied you won't get anything out of it either.

Most likely you are attempting to read out a patched/locked file.